Serious(ly absurd & outrageous) Improv & Sketch Comedy  

For 5 years, Grafenberg Productions has brought to Denver high-quality improv and sketch comedy in the style of iO Chicago and Annoyance Theater.  We offer tickle-your-brain-funny shows and serious, yet fun and down-to-earth classes that can help you get the tools you need to be successful both on- and off-stage.

All classes and shows happen at Comedy RoomRoom (2104 Larimer St Denver, CO 80205)


Improv and Sketch Comedy Production Powerhouse


Grafenberg needs YOUR help!

Grafenberg has acquired its OWN theater space in the heart of lower downtown Denver.  We are in the process of building out the space and could use YOUR help!  Please spread the word, or donate via our Indigogo campaign's many perks!  From ticket discounts to majorly discounted classes, you can score on some pretty awesome stuff while helping us out.  Just click below!


We do long-form improv & sketch comedy, embracing our inner rebels to push social boundaries.


(Hardcore) Classes

From $5 Drop-In Improv every Tuesday night at Comedy RoomRoom to intensive, student-focused improv and sketch courses that will take you from novice to director and producer, we have the class for you!


Special upcoming workshops!

Don't miss our upcoming special workshops with Aden and Eric Nepom from Mount Olymprov and Chris Gropp from right here in Denver!  Right now, You can learn acting for improv for only $30 taught by BOTH Aden and Eric Nepom, or you can learn one-person improv in a 2-day workshop from Chris Gropp for only $60!  The workshops takes place on July 14th from 12 pm - 3 pm and August 18th and 25th, respectively.  Click their faces for more info!!

Grafenberg is filled with wonderful, super talented people who are devoted to the art of improvisation. The training center makes you feel welcome and safe. It also produces amazing improvisors and shows!
— Bryan D.

You won't get any bullshit from us.
We want you to shine! 


(Unique) Shows


Whether you're looking for a regular improv show, something a little different for a date night, or just a laughter-filled evening out in Denver, we've got something going on every week to tickle your fancy.

Check out our show calendar and see what all we have going on!

A very inclusive, fun-oriented, supportive theater group. I always have a blast playing or watching, and there are always things going on!!
— Lizz M.
Best improv training in Denver. Shows are original and hilarious.
— "Cannonball" F.

(Awesome) Teachers & Coaches

Grafenberg Productions has some of the best improv teachers in Denver. They've studied locally and nationally and are now focused on growing the long-form improv community in Colorado, playing off the Chicago iO and Annoyance Theaters styles.


Justin Franzen

Co-owner. Executive Director. Teacher. Lover.


Sheevani Desai


Coach. Teacher. Urban Arm Rasslin Champ.


Chris Teregis

Teacher. Preacher. Cat Tamer.


Billi Lynn

Teacher. Singer. Bringer.


Joe Zordan


Teacher. Beat Boxer. Beet Boxer.

Katie Matthews

Managing Director. Teacher. Fighter.

Daniel Horsey

Coach. Teacher. Artist.

Don't be the dummy that misses out!


(Latest) News